Steve Beaver wrote: >IBM ALCS became zTFP. I don't think so. My understanding, from Wikipedia primarily, is that the ALCS and z/TPF family tree started with a common root ancestor in the SABRE project for American Airlines. SABRE entered initial pilot service in 1960 on IBM 7090 machines.
Then PARS -> ACP -> ACP/TPF -> TPF -> TPF/ESA -> z/TPF (IBM supported today). PARS definitely made it onto System/360, probably from 1965 with the first machines. However, there were at least three PARS customers that started on IBM 70xx machines: American, Delta, and PanAm. (Were there any others?) All three switched over to System/360 and successor machines fairly quickly. ALCS started as a variant of ACP (or ACP/TPF or TPF?) that was (re)platformed onto MVS. Like z/TPF, ALCS continues to evolve, and the latest release of ALCS is IBM supported on z/OS. Oddly enough, the reverse was possible for a while: early releases of MVS (and perhaps all releases of SVS) could run atop ACP. Today's z/TPF, and today's ALCS on z/OS, can run as z/VM guests. For a while there was also a variant of PARS called CPARS (Compact Programmed Airline Reservations System). -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM Z & LinuxONE, Multi-Geography E-Mail: [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
